TY  - JOUR
AU  - V. V. Filippov
TI  - A mixture of the Leray--Schauder and the Poincar\'e--Andronov methods in the problem of periodic solutions of ordinary differential equations
JO  - Differencialʹnye uravneniâ
PY  - 1999
SP  - 1709
EP  - 1711
VL  - 35
IS  - 12
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1999_35_12_a14/
LA  - ru
ID  - DE_1999_35_12_a14
ER  -